A detackifier is a chemical process that reduces the stickiness of other substances. Paint spraying and paper making is a process in which inputs may need to be de fi ne or "denatured".
Video Detackifier
Spray painting
Spray painting with solvent-based or water-based paint creates an excessive paint spraying, waste material that must be effectively neutralized, or "detackified", and collected for disposal. To assist in the removal of paint that drifts from the air and to provide efficient operation of the spray water spray paint holder, use detackifying paints chemical agents. Product detackification is generally introduced into water that is recirculated in a spray paint stamp system. The first goal is to make the paint not so tacky that it does not stick to the booth equipment and soil the paint system. The second goal is to efficiently collect the sprayed paint solids into the system and dispose of them from the water for disposal.
Booth spray booths for vehicles are typically 100-300 feet long and usually contain many robotic and manual spray zones. Temperature and humidity are strictly controlled in this system. When items are painted in these chambers, certain paint do not contact the painted article and form a fine mist of paint in the air space around the article. This paint should be removed from the air. To achieve this, the contaminated air is pulled through the spray paint booth by the exhaust fan. A circulated water curtain is maintained along the air path in such a way that air must pass through the water curtain to reach the exhaust fans. When the air passes through the water curtain, the paint mist is "rubbed" from the air and taken to the sludge pit, usually located under the spray booth of paint. In this area, the paint particles are separated from the water so the water can be recycled and the paint particles removed as mud paint. Cat detackifiers commonly added to this system are melamine-based formaldehyde, based on the chemistry of acrylic acid, or chitosan.
The word detackification in the context of spray painting has been interpreted more than just the charge neutralization. Actually, it now means the whole process, which includes detackification and flocculation.
Maps Detackifier
Paper creation
Detackifiers reduce the stickiness of materials such as pitch or adhesive so they have little inclination to form agglomerates or to deposit into paper-making equipment or make freckles in the product. Pitch is a generic term for the hydrophobic wood resin material found in pulp. Resins are the woody organic components commonly found in all trees. In papermaking, the most widely used detackifier is talc, anionic dispersant, ethoxylated surfactant, and cellulose-based detackifier. The pure chemical talc formula is magnesium silicate Mg 3 Si 4 O 10 (OH) 2 . Talc is a soft mineral with a relatively water-hating surface. Both of these attributes, softness and hydrophobicity are easily observed when a person pinches some powder powder and then releases it to the surface of the water in the sink. In addition to talc, there are a number of chemical products that are also marketed as detackifier. A common feature of these chemicals is that they are weak (sometimes cationic) polyelectrolytes, and they have a tendency to form films on the surface of clogged or hydrophobic material.
Some of the key practical rules for powder are (a) dissolving it well, (b) adding it to the process flow that gives the biggest problem, (c) adding it early enough to the process with sufficient agitation, and (d)). If too little talc is used, talc is only put into deposits and agglomerates of tacky materials. It also makes sense to use an effective retention aid program to maintain talc (and embedded material), clean up problems from wet-end systems. Similar considerations apply to the use of organic detackifier. In both cases, the best place to start in dealing with deposit issues is chemical analysis. Some major paper-making research groups have equipment for laboratory-scale simulation of pitch and adhesive problems.
See also
- Agent fixation
References
Source of the article : Wikipedia
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